Notching apparatus



Nov.) 28, 1944. G. F. WALES 2,363,530

NOTCHING APPARATUS Filed March 4,v 1942 2 Sheets-Sheet l NOV- 28, 1944.G. F. WALES 2,363,630

NOTCHING APPARATUS Filed Maron 4, 1942 2 sheets-sheet 2l Kw INVENTOR.

BY ATTORNEYS' .line 8 8, Fig. 1.

ures of the drawings.

Patented Nimes, 1944 UNITED STATE-s. PATENT' met t `No'rcmmu APPARATUSGeorge F. Wales, Kenmore, N. Application Magen 4. i942'. serial No.433,279 is csims. (ci. ici-so) notches able in operation and capable ofhaving its cutting members quickly and easily sharpened withoutrequiring extensive disassembling of the parts for this purpose..

Another object of this invention is to so construct the notchingapparatus that it can bereadily operatedin association with the bed andram of `an, ordinary press without requiring any mechanical connectiontherewith and thus may be quickly placed in a press for use and likewiseremoved therefrom when not required.

A .further object of this invention is to provide simple and eillcientmeans whereby the punch l arm and the die plate of the apparatus may beconveniently and reliably mounted on the base of the apparatus andpermit of easily using diiferent pairs of die plates and punch arms forproducing notches of diiferent shapes on the work- Pieces.

In the accompanying drawings:

Fig. 1A is a side elevation oi' one form of notching apparatus embodyingthis invention.

Fig. 2 is a front elevation of the same.

Fig. 3 is a top plan view thereof.

4 4, Fig. 2. v Y A t Fig. 5 is a horizontal section taken on line l-i.

Fig. 4.' i

Fig. 6 is a vertical llig. 7 is a fragmentary perspective viewof anangle -iron having its flanges notched by the use of the apparatus shownin Figs. 1-6.

Fig. 8 is a vertical longitudinal section of a notching apparatusembodying the present improvements but adapted more particularly fornotching the ends of tubular workpieces.

Fig. 9 is a top plan view of the same.

Fig. 10 is a front elevation thereof.

Fig. 11 is a perspective view of a tube having its end `notched by theapparatus shown in Figs. 8, pand 10.

In the following description similar reference characters indicate likeparts in thev several iig- Fig. 4 is a vertical longitudinal sectiontaken on .line

transverse section taken on Although the apparatus shown in Figures 1-8is more particularly designed for producing V- iron, as shown in Fig.f7, the same may also be employed for producing various forms ,ofnotches in the edges of sheet material orthe like by mak ing the cuttingedges of the'die andpunch members, of the apparatus of the desired form.

Referring to the construction shown in Figs.

1-6. the numeral 20 represents 'the base .of the notching apparatuswhich may bemade of any suitable metal, but, preferably cast iron.` Thisbase may alsobe of any desired contour although the rectangular formshown in the drawings is preferred. In its front part this baseisprovided with a vertical discharge opening ,or chute 2i through whichthe slugs cut from the workpiece', during operation of notching thesaine;y are discharged from the apparatus. this opening in the presentcase extending from the upper to the under side ofthe base, as shown inFig. 4.

In its rear side the base is provided with a rearwardly opening recess`22'and on the-central part otits upper side the sameis provided with anupwardly opening spring socket 23, 'On its rear part the base isprovided with two bearing lugs 2t which projectupwardly along oppositesides of the recess 22 and each of which is provided on its front sidewith a retaining recess, groove or notch 25, the lower side of which thebase, asbest shown in Figs. 1'4.

The numeral 26 represents a die plate of steel or the iikelwhich restson the frontpart of the base and provided in its rear part with al dienotch' 21- which extends to the rear edge of this plate and registerswith the upper end of the slug chute in 'the'basa The corners betweenthe top of the or worn by grinding the upper side of the die platesuillciently to restore these cutting edges. a'

The die plate. may be detachably secured to the base by various meansAbut preferably by screws 29 passing upwardly through openings in thebase and engaging threaded openings-in the die plate. For the purpose ofan accurate position ber with which the die plate cooperates two dowelsor alining pins 30 are employed. each of which is arranged incorresponding alining openings formed in the base and die plate.

For the purpose of assisting the screws 28 in holding the die plate onthe base this plate engages its rear edge, on opposite sides .of itsnotch n.18 in the iianges. I8, Il of an'angle is flush with the top ofmaintaining the die plate in relative to the punch mem- L'and engagingits outer edge with a 21, with the retaining recesses or grooves of thelu 's 24, as shown in Figs. 1 and 4.

The umeral 3| represents a vertically swinging punch arm the rear partof which is arranged between the bearing lugs 24 and pivoted thereto bya horizontal pivot pin 32 passing transversely throughthe rear parts ofsaid lugs and the punch arm, as shown in Figs. 1, 3 and 4. At its frontend the punch arm is provided with a cutter blade or punch 33 which hasa flat under side 34 and forwardly converging sides 35 so as to provideAthe punch blade. In order to maintain the proper.

V-shape of the cutting edges 36 of the punch blade notwithstanding thatsome of the material is removed from its 4underside 36 during thesharpening operation the front end or edge 31 of the punch blade iscurved concentrically with the axis of the punch arm, as shown in Figs.1 and 4, thereby maintaining the proper v-formation of the cutting edge33 on the punch blade regardless of the grinding for sharpening thesame.

Depression of the punch arm for effecting a notching operation may beproduced in any suitable manner, but preferably by placing the base ofthe notching apparatus on the bed of a press and engaging the top of thepunch arm by the descending ram of the-press. 1

Raising of the punch arm is preferably effected by a lifting spring 33seated with'its lower end in the spring socket 23 of the base while itsupper en d is seated in a socket or recess 39 on the underside of thepunch arm in front of its axis.

Upward movement of the punch arm is limited `by a stop 40 projectingdownwardly from the punch arm in rear of its axis and adapted to engagea rearwardly facing stop 4i on the rear part ofthe base. For the purposeof enabling the punch arm to normal extent to facilitate sharpening ofthe die plate disassembling of the parts ofthe notching apparatus forthis purpose. means areprovided for conveniently detaching the stop 4ifrom the base. The preferred form of the means for accomplishing thispurpose shown in Figs. 1, 4 and 5 comprise a stop block 42 arranged inthe recess 22 of the base'and having-the stop 4I on its rear side whileits front side engages with the inner end of the recess 22. tachablyconnected with the base by means of a screw I5 arranged below the pathof the stop lug 4 3 on the punch arm.

' When the notching apparatus is not in use the punch arm is elevated bythe spring 33 and the punch stop 43 engages with the base stop 40 andarrests the upward movement of the punch ann into a position in which agap is formed between the die plate and punch blade for the reception ofthe workpiece which is to be notched. As shown by dottedlines in Fig..1, this workpiece is represented as an angle iron which has one flangel1 resting horizontally on .the die plate gage surface be turnedupwardly an ab- This stop block is de- 43 formed by the `front side ofthe bearing lugsv 24 immediately above the recesses 25 thereon while theother flange I6 is arranged vertically immediately in front of the punchblade. Upon depressing the/punch arm by means of a press ram-orotherwise the blade of the punch will press downwardly on the respectiveflange of the angle' iron and, by cooperation with the cutting edges ofthe notch on the die plate, will cause a slug to be cut or sheared outof the works piece and a yV -notch formed in the same.

This form of notching apparatus is particularly desirable forcuttingnotches in the flanges of angle irons close to the inner corners of thesame and thus permit using such notched angle iron advantageously forcertain installations. An example iron would be to provide therespective flanges of the same with a pair of notches which aretransversely in line, as shown at the left of Fig. 7. An angle iron thusnotched would leave a small web 44 on the respective flanges between theinner ends of the corresponding notches which web can be easily bent forbringing adjacent sections of the angle iron linto an angular positionrelative to each other and thus form a frame binding or the like inwhich the several sections are integrally connected.' This is ofimportance to hold the two mitered edges together for welding.

When it is desired to sharpen the cutting edges of the die plate andpunch arm the stop block 42x is detached from the base after removingthe screw I5. The punch arm can now be swung from its normallyhorizontal position, shown by full lines in Fig. 4,'to a retractedverticalposltion, shown by dotted lines in the same figure. therebyfully exposing the upper side of the die plate and the underside of thepunch blade and 40 permitting of conveniently grinding these sides andthe punch arm without requiring undue Y ing the punch blade or surfacesby means of the usual grinding apparatus employed for this purposewithout requiring disassembling of other parts of this notchingapparatus.

The form of notching apparatus shown in Figs. 8. 9 and 10 is moreparticularly designed for cutting U-shaped notches 43 in the ends oftubes 46 which may be either of rectangular form in cross section, asshown in Fig. 11, or of other desired forms but this apparatus may alsobe used for cutting other shapes of' notches in tubes and in otherarticles. The construction of this notching apparatusis substantiallythe same Aas that shown in Figs. 1-6.

7 the chief differences consisting in providing the base 20 withperforated ears 41 on its laterally opposite sides for the reception ofbolts or screws whereby the same may be attached to the bed of a pressor other support, also extending the slug discharge chute 43 from plateto the front of the base, and also construct- 49 in theform of a narrownose which is adapted to receive the end of a tube and cutone or moreU-shaped notches 48 into the same. The stop 50 on the punch arm is alsomade in the form of a shoulder which faces downwardly from the punch armin rear of its axis,

spects the two forms of this invention are alike of thus advantageouslynotching an angle y the underside of the die land the hub of the puncharm has a concentric with a correspcnd- 4stop of said punch arm for andthe description ofthe construction shown in Figs. l-T is thereforeapplicable to the construction shown in Figs. 8. 9 and 10.

I claim as my invention: l l. A notching apparatus) comprising a baseprovided onv its rear part with upwardly projecting lugs, a die platemounted on lthe front part .of

cutting notch, a punch arm larranged between said lugs and pivotedthereto and providedA in cutter blade without removing the cutter armAand its blade from said lugs. y

2. A notching apparatus comprising a base provided on its rear partVwith upwardly projecting lugs, a `die plate mounted on the front partofA said base and provided in its rear edge with a cutting notch. apunch arm arranged between said lugs and pivoted thereto and provided infront o f its axis with a cutter blade adapted to cooperate with thecutting notch of said die plate l and also provided in rear of its axiswith a stop, a stop block arranged between said lugs` and detachablyconnected with said base and provided with a stop adapted to'be engagedby the stop of said punch arm for limiting the separation of said videdon its rear part with a rearwardly` opening t recess and two .upwardlyprojecting bearing lugs said b ase and provided in its' rear edge with afront of its axis with a cutter blade adapted-to A.and provided onopposite sides of said recess, a'die plate secured to the upper side ofthe front partof said -base'and provided with a cutting notcinavertipunch arm having its rear part.

ally swinging v arranged between said lugs and pivotedthereto on itsfront part with a cutting blade adapted notch. a stop punch arm 'in rearof its axis,=.a stop block-arranged in said rear recess and having areari wardly facing st op adapted to be engaged by the arm and plate.and a lifting spring engaging its j upper end with the underside of saidpunch arm in front of its axis and resting at its lower end on'said basebetween said die plate and said stop block.

3. A notching apparatus comprising a base, a die plate mounted on saidbase and provided on its rear side with a notch having a cutting edge.and a vertically swinging punch arm pivotedat its rear end on the rearpart of said base and providedon its front end with a' cutter bladehaving cutting edges on its opposite sides adapted Y to cooperate withthe cutting edges of said notch for producing notches in a workpiece,land also A is controlled so as having its frontend curvedconcentrically with the axis of said punch arm.

4. A notching apparatus comprising a base provided` with a slugdischarge chute and two bearing lugs rising fromthe rear part of thebase on opposite sides of said chute and provided with recesses on theirfront sides, a die plate mounted on said base ,and provided on its rearside with a notch having a cutting edge and engaging'its rear side withthe recesses in said lugs, screwsv connecting said plate with said base,a vertically swinging punch arm having its rear'part arranged betweensaid bearing lugs and pivoted thereto and provided on its front. partwith a cutter blade,

' the opposite cutting edges of which are adapted to cooperate with thecutting edge-of said notch for producing notches in a workpiece, aspring for yieldingly holding said arm in an elevated position, `a stopprojecting downwardly from the punch arm in rear-'of its axis, and arearwardly facing stop arranged on the rear side of said base andadapted to be engaged by the downwardly projecting stop on said arm.

i. 5. A notching apparatus comprising a base pro- 'stop on the puncharm. and connecting said stop block with said/base.

6. A notching apparatus comprising a base, a dieplate mounted on thefront part of said base and provided on its rear ing cutting edges, andapunch arm pivoted at its rearend on the base and provided on the under-Screw detachably side oi' its `front part with cutting edges adapted toengage with the cutting edges of said notch and the frontend of said armbeing curved concentrically with the axis of the same.

7.- In a notching apparatus having a' base, a die member supported bysaid base and having a pattern cutting edge extending ffrom the rearedge orward into said die member, a reciprocating punch member having acutting edge of`corresponding pattern fulcrumed on said base, a

stop tol limit the movement of the punch member,

stop being removable to enable said punch cutting edge to be away fromsaid die member. said swung to a position for increasingthe spacingyletween said punch and the cutting edge of said ie. I

8. A notching unit. comprising a base, a die mounted on the base, apunch mounted directly on the base and movable toward and from the die,and means whereby the stroke of the punch to render the same relativelyshort during normal operation of the punch and to increase the extent ofmovement of the punch away from the die to facilitate sharpeningofthepunch without dismounting the same from the base.

9. In a notching apparatus having a base, a die I member supported bysaid base, a-cooperating punch member fulcrumed on-said base, aresilient device for retaining said punchmember yieldingly in elevatedinoperative position above said die member, means to enable said punchto be further spaced from said die cutting edge to provide increasedspace for grinding the top face of said die member and the 4cooperatingface of said punch member without detaching the punch from the base.

f A ing said punch member so 10. In a notching apparatus having a base,a die member supported by said basel a, punch member fulcrumed on saidbase, means for guid- Bs to engage and disengage its cutting edge withthe cutting edge of said die member including upwardly projecting lugson said base spaced apart to accommodate and a fulcrum pin extending tocooperate with said cutting projecting downwardly from the edge with anotch havmember and' lugs, said lugs l. and engaging said die memwithoutremoval of the same 12. In a notching apparatus having abase, a diemember supported by said base, a cooperating punch member i'ulcrumeddirectly on said base, and control means for controlling the extent otthe gap between said punch and die members to permit grinding of eithermember without removal oi the same from said base including the releaseof said gap control means.

13. In a notching apparatus havingy a base, a

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die member supported by said base, acooperating punch member fulcrumeddirectly on said base. and control means for controlling the extent 0l'the gap between said punch and die members to permit grinding of eithermember without removal of the same from said base including the removalof said gap control means which is normally in the space under saidfulcrum.

, GEORGE F. WALES.

